Back in England, Mae is devastated to learn that George has moved on - and disastrously attempts to have a platonic friendship with her.

One of our Final Four players is disqualified, opening the door for a surprise upset, and a dramatic showdown. As outside pressure on the game escalates, the consequences are wild... literally. Our players learn the hard way what's really at risk when you gamble it all on a game.

Gus follows a reluctant Big Man into the unknown. Dr. Singh discovers what it will cost to save Rani. Aimee finds a new beginning after the world ends.

Josh Niland demonstrates how to make the most of a Murray cod utilising the entire fish. For this challenge, contestants are given one Murray cod and must use the same fish for up to three rounds.

Batgirl finally has the chance to live out her life's dream and be the sidekick to her hero and inspiration - the Batman!

Batgirl finally has the chance to live out her life's dream and be the sidekick to her hero and inspiration - the Batman!

Emily agrees to help Bill test her for the virus, but soon experiences serious side effects. Sacha, who has secretly followed the group to stay close to Emily, tries to remove her from the group. For their part, Catherine, Sophia and Nathan set out again in search of Bill Ward.

Mark Cobden is sent to prison and has to learn quickly how to survive. When an inmate identifies prison officer Eric McNally's weakness, he faces an impossible choice.

Catherine, Sophia, Zoe and the other survivors, finally reunited, prepare for the ultimate attack. But it is Bill who is the only one to hold the fate of humanity in his hands, provided he is helped by Isla.